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Old 08-18-2011, 06:02 PM   #4
Tom Endy
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Join Date: May 2010
Location: Southern California
Posts: 2,468
Default Re: Ok so a brand new radiator and it still runs hot

I am of the opinion that the number of rows of tubes in the radiator core is more important than the fins per inch specification. I bought a radiator a few years ago from one of the more popular radiator vendors that was specified at 10 fins per inch. I had the same problem you are describing. Around town it was fine. Climbing a grade or out in the desert it boiled over.

I thought the tubes may have become plugged from rust in the engine. I took the radiator to a radiator shop to have it rodded out. When they pulled the tanks off the tubes were not plugged, but there was only two rows of tubes.

I had the core replaced with a four row core and now the temp gauge stays locked on 160 (the thermostat setting) no matter where I travel.

I think the best solution to Model A radiators is to take an original radiator to a shop that speaks Model A and have them install a four row core.

Tom Endy
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